Attribution Analysis on Deformation Feature of the Shanghai Elevated Highway by Persistent Scatterer SAR Interferometry
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摘要: 上海市高架道路是上海市重大基础设施工程之一，跨越11个行政区，打通了城市交通脉络。为保证其安全运营和可持续发展，利用高分辨率永久散射体雷达干涉测量技术对高架路进行沉降监测，沉降结果与同期水准数据基本保持一致，最大误差不超过3 mm/a。进一步联合高架路的结构特性、运营车辆的动荷载情况、高架路施工进程，分析了提取的高架路沉降的空间分布情况以及时间演化行为。多因素的归因分析结果表明，上海市高架道路沉降格局与周边区域地面沉降密切相关，同时与高架道路自身荷载和运营车辆动荷载、高架道路建成时间有关。Abstract: Elevated highway is one of the major infrastructures in Shanghai spanning 11 administrative regions. In order to ensure its safe operation and sustainable development, high-resolution persistent scatterer interferometric synthetic aperture radar (PS-InSAR) technology is used to monitor and analyze the displacement of the elevated highway, combining with the level data to further verify the monitoring accuracy. The settlement results are basically consistent with the leveling data, and the maximum error does not exceed 3 mm/a.The results of multi-factor attribution analysis show that the settlement pattern of elevated roads is closely related to the land subsidence in the surrounding areas, the dynamic load of the operating vehicles, and the time about elevated road was built.
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Keywords:
- PS-InSAR /
- elevated highway /
- subsidence monitoring /
- operational state /
- attribution analysis
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图 2 影像的空间覆盖范围，包括高架分布图和已知水准点位
Figure 2. Space Coverage of the Images, Including the Elevated Road Maps and Known Leveling Points
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图 4 水准测量与InSAR监测的形变速率对比
Figure 4. Comparison of Deformation Rate Monitoring by Leveling and InSAR
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图 6 高架路周边地面沉降速率图
Figure 6. Subsidence Velocity in the Surrounding Area Along the Elevated Roads
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图 7 上海高架道路工作日拥堵指数分布图
(央广网，2017)
Figure 7. Congestion Index Distribution of Shanghai Elevated Road on Weekdays
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图 8 不同建成时间高架路沉降速率对比图
Figure 8. Comparison of Settlement Velocity of Elevated Highway for Different Construction Time
表 1 影像及干涉对信息
Table 1 Basic Information of the Interferograms
左实验区 右实验区 时间 垂直基线/m 时间 垂直基线/m 2016-10-13 -105.4 2016-10-24 182.8 2016-11-15 -31.6 2016-11-26 101.1 2016-12-18 83.2 2016-12-29 331.5 2017-01-20 -57.4 2017-01-31 174.6 2017-03-05 -132.4 2017-03-16 4.2 2017-04-29 0 2017-04-18 0 2017-05-21 -86.1 2017-05-10 189.1 2017-06-12 -85.8 2017-06-01 116.2 2017-07-04 44.8 2017-06-23 270.1 2017-09-08 -52.4 2017-07-15 192.8 2017-09-30 -435.1 2017-08-06 196.5 2017-10-22 52.7 2017-10-11 -155.1 
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项目 等级 畅通 较畅通 拥挤 堵塞 指数区间 [0, 30) [30, 50) [50, 70) [70, 100) 车流现象
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表 3 形变速率统计表
Table 3 Statistics of Settlement Velocity
形变范围/
(mm·a-1)所占比例/% 2000年前通车 2000年后通车 -10~-5 5.58 10.23 -5~0 35.09 43.53 0~5 49.04 41.89 5~10 10.29 4.35
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